Several years ago National Geographic Magazine published what struck me as an absolutely astounding story.
It stated that every single human being on the face of the earth today is a descendant of a rather small number (perhaps only a few hundred) people who emigrated out of Africa around 60,000 years ago, embarking on a trek that would quite literally take them to the very ends of the earth. This conclusion was based on advances in genetics and DNA samples taken worldwide.
A friend had shown me the magazine in the middle of an expedition to a deep canyon carved by the Río Verde and I still have the photo I took of that magazine lying open on the front seat of his Jeep, displaying a map with arrows showing early Man’s first travels abroad.